/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package org.ugc.cnel.manabi.servlets;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.ugc.cnel.manabi.entidades.Adjuntos;
import org.ugc.cnel.manabi.jpa.AdjuntosJpaController;

/**
 *
 * @author Admin
 */
public class download extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        AdjuntosJpaController adjpa = new AdjuntosJpaController();
        String ids = request.getParameter("id");
        try {
            Adjuntos adj = adjpa.findAdjuntos(Integer.parseInt(ids));
            File archivo = new File(adj.getNombre());
            if (archivo.exists()) {
                FileInputStream fis = new FileInputStream(archivo);
                ServletOutputStream sos = response.getOutputStream();
                response.setContentType(adj.getTipoArchivo());
                response.setHeader("Content-disposition", "inline; filename=" + adj.getNombreReal() + "");
                response.setHeader("Cache-Control", "max-age=30");
                response.setHeader("Pragma", "No-cache");
                response.setDateHeader("Expires", 0);
                byte datos[] = new byte[10];
                while (fis.read(datos, 0, datos.length) != -1) {
                    sos.write(datos);
                }

            } else {
                response.sendError(response.SC_NOT_FOUND, "El Archivo : " + archivo.getName() + " no existe en el directorio");
            }
        } catch (Exception ex) {
            System.out.println(ex);
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}

